The sso is throwing error, if custom application opened directly without apps login
System error. Please re-try your action. If you continue to get this error, please contact the Administrator.
the custom URL which i have tried to open which has Guest permission is
http://<Oracle Application Instance>/OA_HTML/OA.jsp?OAFunc=XXIRC_FLSDK287_JOB
it will open another page which has internal functional of changing Guest user to oracle SSO System login user